baber/WOPTO huggingface dataset:
Patent GB-995908-A (GB)
Title: Improvements in circuit arrangements for operating gas discharge lamps
Inventor: SEIB MARTIN RAYMOND PERCIVAL
IPC: H05B41/04
Filed: 1962-03-27
Abstract: 995,908. Supply circuits for discharge lamps. CAPS RESEARCH Ltd. April 3, 1963 [March 27, 1962], No. 11757/62. Heading H2H. A mercury arc discharge lamp 25 is started by high-frequency pulses generated by a pushpull transistor oscillator 4 and superimposed on the output from the winding of an autotransformer 1, a switch 11 operating after a predetermined time to connect the lamp 25 and its ballast choke 26 to only half the autotransformer winding for normal running. The oscillator 4 is supplied from the autotransformer 1 through a rectifier bridge 3 which also supplies the windings 5, 6, 7 associated respectively with locking switches 8, 9, a thermal delay switch 12 and the switch 11, the positions of these switches when the circuit is unenergized being as shown in the drawing. Closure of a main switch 2 energizes the oscillator 4 and windings 6, 7, and causes instantaneous engagement of contacts 22, 23, 24 followed by permanent engagement of contacts 22, 24 to connect members 25, 26 and the secondary winding 21 of the oscillator transformer 19 in series across the autotransformer 1. Striking of the lamp 25 reduces the oscillator open loop gain below unity to damp the oscillations, the output of autotransformer 1 being sufficient to maintain the lamp current, and the oscillations increasing to their initial value should the lamp go out, thereby causing restriking. After a predetermined time the delay switch 12 operates to de-energize the windings 6, 7 and energize the winding 5 which is locked by the respective opening and closing of its contacts 8, 9. Deenergization of winding 7 causes engagement of contacts 23, 24 and their subsequent separation from contact 22 to disconnect the winding 21 and connect members 25, 26 to approximately half of the winding of autotransformer 1. An electromagnetically controlled air valve whose winding 28 is responsive to the lamp voltage is operated to supply cooling air to the lamp when its arc voltage has risen to the normal operating value. The oscillator 4 remains energized after the switch 12 has operated and is inhibited by a resistor 27 which also prevents arcing between the contacts 22, 24. Striking of the lamp 25 causes the core of transformer 19 to be driven into saturation.
Patent GB-309870-A (GB)
Title: Method and apparatus for lapping spur gears
IPC: B23F19/04
Filed: 1929-04-16
Abstract: 309,870. R÷hl, F., and Hofmann, F. April 16, 1928, [Convention date]. Gear-wheels, grinding and trueing teeth of; wheels and other tools.-In a process for lapping straight or helical or internal spur gears, particularly after heat treatment, an engaging pair of gears are moved relatively in both axial and radial directions to effect the lapping operation while a slow rotation of the gears effects the feed. By this process the movements between the gear surfaces may be as shown in Fig. 4, and any fine longitudinal serrations or facets on the tooth surfaces produced by previous tooling operations are removed. In some cases a gear may be run in mesh with a master tool having surfaces which are provided with abrasive-holding grooves as shown in Fig. 3. In carrying out the process, gears a, b, Fig. 5, either of which may be a master gear, and mounted on spindles h, i, respectively, the former spindle being reciprocated by means of a segment k oscillated from a crank disc and engaging a circular rack l. The spindle i may be shifted laterally to impart the radial lapping movement and either or both spindles may be driven for the rotary feed movement by means of worm bearing m, n, the wheel n on the spindle h being feathered to permit the axial movement of this spindle. The Specification as open to inspection under Sect. 91 (3) (a) describes also a machine, Figs. 6 (Cancelled) and 7 (Cancelled) comprising a driving-shaft h carrying a crank disc t which is arranged to oscillate a shaft v carrying a double lever w which imparts axial reciprocating movement to a pair of gear-carrying spindles s, s<1>. The spindles are rotated at slow speed for the feed movement by means of a shaft m, worm gearing p and spur gearing r. The spindles s, s<1> coact respectively with spindles d<1>, d" carrying mating gears, these spindles being carried on pivoted arms c' and being operated to give the radial component of the lapping movement by means of adjustable connecting rods b<1> actuated from the shaft m through bevel gearing o, y and crank disc z. The spindles d', d<11> are mounted in sleeves and the required lapping pressure is obtained by means of spring-brakes g'. After completing one side of the tooth surfaces, the machine is reversed to finish the opposite sides. This subject-matter does not appear in the Specification as accepted but forms the subjectmatter of Specification 332,230.
Patent GB-742493-A (GB)
Title: Stabilizers for chlorine-containing vinyl resins
IPC: C08L27/04
Filed: 1953-04-28
Abstract: A chlorine containing vinyl resin composition, having improved resistance to discolouration at elevated temperatures, contains as a primary stabilizer a known lead or tin acceptor for hydrogen chloride, and as a secondary stabilizer a condensation polyester of a mercapto alcohol and a dicarboxylic acid.  The amount of secondary stabilizer is normally 0.01 to 5 per cent of the weight of the vinyl resin.  Specified vinyl resins are polyvinyl chloride; copolymers of vinyl chloride with vinyl esters of aliphatic acids, esters of acrylic or methacrylic acid, acrylonitrile or vinylidene chloride; after chlorinated polymers; and polyvinylidene chloride.  Specified primary stabilizers are dibutyl tin laurate, dibutyl tin maleate, lead carbonate, lead silicate, tribasic lead sulphate, litharge, lead salicylate, lead maleate, dibasic lead phosphite and dibasic lead phthalate.  The condensation polyester may be obtained by condensing mercapto methanol; 2-mercapto ethanol; 2- or 3-mercapto propanol; 1-, 2-, 3- or 4-mercapto butanol; 1,3-dimercapto propanol; 1,4-dimercapto butanol; 2-mercapto propanediol-1,3; or 3-mercapto butanediol-1,4 with maleic, malonic, adipic, succinic, oxalic, fumaric, glutaric, pimelic, suberic, azelaic or sebacic acid.  Condensation may be performed in a solvent in presence of an esterification catalyst. As an example a mixture of 1 mol. of 2-mercapto ethanol, 1 mol. of malonic acid, benzene and hydrochloric acid were heated under reflux. At the end of 72 hours, excess benzene was evaporated off and the poly-condensate put in a vacuum oven to remove traces of mercaptan. The vinyl resin composition may also contain a plasticizer such as di(2 - ethylhexyl)phthalate, di(butoxyethyl)phthalate, glycidyl oleate, epoxidized soy bean oil, tri(2-ethylhexyl)phosphate or diphenyl mono-octyl phosphate. The examples disclose polyvinyl chloride sheets comprising (a) 100 parts of polyvinyl chloride, (b) 40 parts of di(2-ethylhexyl)phthalate, (c) 2 parts of lead silicate or lead phosphite, (d) 0.5 parts of stearic acid, (e) 1 part of titanium dioxide, and (f) 0.1 part of a condensation polymer of 2-mercapto ethanol with maleic, malonic or succinic acid.
Patent GB-1471201-A (GB)
Title: Penstocks
IPC: E02B7/28
Filed: 1975-01-07
Abstract: 1471201 Moulding foam filled panels COPLASTIX Ltd 7 Jan 1975 [16 March 1974] 11806/74 Heading B5A [Also in Division E1] A penstock door is made by arranging a pair of skins 10 in superimposed relationship on a frame consisting of a central member 13 and a plurality of transverse strips 14. The skins are spaced apart by the frame and by peripheral wall members 11, 12 to form a hollow closed casing having at least one feed aperture 19 and at least one bleed aperture such as 20a or 21. A predetermined quantity of a foamable liquid is injected into the casing through the feed aperture(s) and displaced air escapes through the bleed aperture(s).
Patent GB-564535-A (GB)
Title: Oil distributor assembly
IPC: B24B41/04
Filed: 1943-07-22
Abstract: 564,535. Lubricators. DUMORE CO. July 22, 1943, No. 11943. Convention date, July 24, 1942. [Class 12 (iii)] A lubricant assembly consists of a tube of felt mounted out of contact with a spindle but having at one or both ends a tab extending inwards and touching the spindle. The felt tube 19 is supported by a metal sleeve 17 which has an upper gap bridged by the tube and covered by a perforated-metal strip 22 which is reversely curved to retain the asrembly in position. The tube 19 has end tabs 20 which are maintained radial by end caps 21 having a snap engagement with the sleeve 17. The tabs 20 engage conical parts 16 of the spindle 15 of a high-speed machine, such as a grinder.
Patent GB-887376-A (GB)
Title: Improvements in a method of polymerization of vinyl esters
IPC: C08F8/12
Filed: 1960-04-05
Abstract: 887,376. Vinyl ester polymerization. KURASHIKI RAYON KABUSHIKI KAISHA. April 5, 1960 [Dec. 15, 1959], No. 11987/60. Class 2(6) Vinyl esters are polymerized in the presence of a dialkyl sulphoxide as a polymerization medium. The vinyl ester may be vinyl acetate or butyrate and the medium may be dimethyl or diethyl sulphoxide. The polymerization may be carried out in a sealed tube at 60‹C. in the presence of a catalyst such as azo-bis-isobutyronitrile and the polyvinyl ester may be saponified, e.g. by methanolic sodium hydroxide.
Patent GB-417880-A (GB)
Title: Improvements in machines for cutting up paper, tobacco and similar materials
IPC: B26D1/24
Filed: 1933-04-27
Abstract: 417,880. Cutting and severing machines. LEGG, O., 21, Goswell Terrace, Goswell Road, London. April 27, 1933, No. 12276. [Class 31 (i).] A cutting mechanism of the kind comprising two parallel shafts 3, 4 carrying interspaced shearing discs 1, 2 for cuttingpaper&c. into a number of strips, is provided with stripper plates 5 mounted, on shafts 6, in alignment with the respective discs 1, 2. The plates 5 are arranged between the extensions 10 of the spacing rings 11 described in Specification 351,485. The plates 5 have curved edges 7 which extend partly around the periphery of the shearing discs, the leading ends 8 of the edges lying close to the periphery and the ends 9 being spaced somewhat from the periphery.
Patent GB-980263-A (GB)
Title: Improvements in the production of direct current for electric welding
Inventor: CHARLIN RENE GEORGES
IPC: B23K9/10
Filed: 1961-04-05
Abstract: 980,263. Rectifying; generators having permanent magnets. SOCOME S.A. April 5, 1961, No. 12286/61. Headings H2A and H2F. In a circuit for deriving D.C. from a permanent magnet alternator connected to give an effective four-phase supply with respect to a common point 9, serving as one output terminal, groups of coils 10 ... 13 feed silicon diodes 8, the outputs of which are commoned at terminal 7. Reactance coils 14a, 14b, 15a and 15b may be provided between the groups of coils and terminal 9, the output being varied by adjusting the cores in the concentrically wound coils.
Patent GB-142832-A (GB)
Title: Stepped lens systems for heat and light concentrating to be used on flying machines
IPC: B64C3/26
Filed: 1920-05-04
Abstract: 142,832. Geneste, P. April 12, 1918, [Convention date]. Aerial warfare.-Consists oi lens devices embodied in the wings of aeroplanes to focus heat or light rays on to enemy troops &c. An aeroplane wing composed of a number of spherical lens portions b around a central lens a is shown in Fig. 4, but parallel cylindrical segments may also be employed. Hollow lenses containing refractive liquids or gases may also be used.
Patent GB-982794-A (GB)
Title: Methods and apparatus for wet spinning artificial filaments
IPC: D01D5/06
Filed: 1962-03-30
Abstract: 982,794. Wet spinning artificial filaments. MONSANTO CO. March 30, 1962 [April 11, 1961], No. 12426/62. Heading B5B. In a process for wet spinning artificial filaments wherein the filaments after leaving the spin bath are passed through a wash-stretch zone to an aqueous wash liquid, the wash liquid in the inlet zone of the wash-stretch zone adjacent to the coagulating bath is maintained at a precisely controlled temperature between 88‹ and 98‹ C., and the wash liquid in the remainder of the wash-stretch zone is maintained at a precisely controlled temperature between 80‹ and 90‹ C., the temperature in the inlet zone being higher than in the remainder of the wash-stretch zone. As shown in Figs. 1 and 2, the spinning solution is extruded through a spinneret 1 into a conventional spin bath 2 and the filaments 6 thereby formed are drawn over feed rolls 3 and 4 and directed into an inclined shoot 5. In passing through the shoot 5, the filaments 6 first pass over a shorter inclined shoot 7 which is mounted on spacers 8 in the inlet portion of the shoot 5. Water, or a mixture of water and a solvent for the filament material miscible with water, at a precisely controlled temperature between 88‹ and 98‹ C. is sprayed on to the upper portion of the inclined shoot 7 by a pipe 9. Water, or a water-solvent mixture at a precisely controlled temperature between 80‹ and 90‹ C. and at a lower temperature than the water or water-solvent mixture delivered by the pipe 9 is sprayed on to the upper portion of the inclined shoot 5 from a pipe 10. This wash liquid runs down the shoot 5, passes under the shoot 7 and is discharged from the lower end of the shoot 5. The wash liquid which passes down the shoot 5 countercurrent to the tow of filaments is for the purpose of removing spinning solution solvent from the fibres. The filaments are drawn beneath the guide rod 16 along the bottom of the upper portion of the shoot 5 and over draw rolls 11 and 12 from which they then pass to a relaxer 13. The tow is then drawn out of the relaxer and dried by the heated rolls 14 and 15. The spinning solution may be a solution of a copolymer of 94% acrylonitrile and 6% vinyl acetate in dimethylacetamide and the spin bath may be an aqueous solution of dimethylacetamide having a concentration of 55%. The stretch ratio between the feed rolls 3, 4 and the draw rolls 11, 12 may be, for example, 5À2. The relaxer 13 may be a metal box provided with a perforated cover and a number of perforated pipes for introducing saturated steam into the box. The peripheral speed of the rolls 14, 15 is less than that of the rolls 11, 12 to allow relaxation or controlled shrinkage of the tow in the relaxer. The relaxation may, for example, be 24%. Specification 775,892 is referred to.
Patent GB-1501553-A (GB)
Title: Conveyor cleaning device
IPC: B65G45/18
Filed: 1976-03-29
Abstract: 1501553 Cleaning conveyer belts H W K ENCHELMAIER 29 March 1976 [29 March 1975] 12483/76 Heading B8A A rotating cleaning brush 31 for engagement with a conveyer belt 10, is mounted on a frame 12 which is pivotally mounted on a pivot 15, the arrangement being such that when the brush is stationary, it drops by gravity away from engagement with the conveyer belt 10, but when it is rotated by its drive motor 17, it is urged into engagement with the belt 10. The upper position of the brush 31 is limited by adjustable screws 37. A drive chain 22 between the motor 17 and the brush 31 is tensioned by a jockey wheel 24. A scraper 18 both cleans the brush 31 and puts a load on the chain 22.
Patent GB-540871-A (GB)
Title: Radio beacon circuits
IPC: G01S1/02
Filed: 1940-08-02
Abstract: 540,871. Directive wireless signalling. STANDARD TELEPHONES & CABLES, Ltd. Aug. 2, 1940, No. 12516. Convention date, Aug. 3, 1939. [Class 40 (v)] A high frequency system comprises a re-entrant loop circuit, a high frequency energy source having a given surge impedance coupled to a point on said re-entrant loop circuit, a network having the same surge impedance coupled to the loop circuit at a point dividing the loop into two parts the lengths of which differ by an odd multiple of a half wave length, high frequency loads of equal impedance coupled to the loop midway between the points of connection of the source and the network, and means for differently modulating the energy delivered from the source to the respective loads. Fig. 2 shows this invention applied to the reduction of cross-modulation between the aerials of a radio beacon circuit, in which an oscillator 100 feeds through a loop circuit 102 provided with a balancing network 108, lines 110, 111 connected to directive aerials 112, 113. Different modulation is given to the energy from each aerial by networks 114, 115 comprising sections of transmission line coupled to leads 110, 111 and provided with condenser plates rotated by a motor 204. The loop circuit 102 is a special form of the high frequency bridge arrangement described in Specification 491,359 and is made in the form of re-entrant loops having a phase changing arrangement such as the transposition 103. With this arrangement, if the impedance of the balancing network is equal to the impedance of the source 100, no energy is reflected from one aerial to another due to unbalance of the aerial impedances. Also when the aerials are matched, no energy flows from the source 100 into the network 108. For best results the distances between the points band d and the position of the modulators, also the length of the arms of the loop circuit are equal to an odd number of quarter wavelengths and the length of the line 101 is an odd number of wavelengths. A suitable modulating arrangement is shown in Fig. 3. Transmission lines 301, 302 carrying the energy to be modulated have mounted close to them a transmission line section 307 closed at one end, and having at the other end a notched rotatable condenser plate 330 for periodically tuning and detuning the circuit. The arrangement is mounted in a trough section 308 which may be provided with a cover plate. Other forms of modulating networks such as those described in Specification 517,935 may be used.
Patent GB-559874-A (GB)
Title: Improvements in or relating to collapsible containers
IPC: B65D35/04
Filed: 1942-09-04
Abstract: 559,874. Making bimetallic collapsable containers. BRUUN, O. J. Sept. 4, 1942, No. 12521. [Classes 83 (ii) and 83 (iv)] Soldering ; squirting.- fhe open ends of bimetallic collapsable containers made of fuzible metal coated with a second fuzible metal such that when heated in contact with each other the metals diffuse with each other into a binary eutectic compound of lower melting point than that of either metal, are sealed by pressing the walls into contact and heating to a temperature between the melting point of the base metal and that of the eutectic so that at the interface a solder is formed composed of the entire opposed layers of coating metal in combination with such proportion of the base metal as is' required to produce the eutectic. The base metal 1 may be of the order of 0.005 inches in thickness, and the coating 2 of the order of 0.0005 inches. A layer of flux may be applied to aid the sealing process. The flux may consist of tallow and vegetable or mineral oils with or without resin, salammoniac or zinc chloride and may be applied to the blank before extrusion so as to act as a lubricant in the extruding operation. A tin container may be coated with lead, cadmium, or bismuth, a lead container with tin, cadmium or bismuth, a zinc container with tin or aluminium, and an aluminium container with zinc, copper, silicon or magnesium. The coating may be applied by cladding, i.e. rolling a sheet on to a billet, electroplating, spraying, chemical precipitation, or vapour condensation. The coating may be applied to a container after formation, or to a billet prior to rolling into a strip, or to the strip or to the slug before extrusion. The coating may be applied to the inner, or outer or both surfaces of the container and to the whole surface or only to the part in the vicinity of the ends to be united. The ends may be pressed together or pressed and folded. In some forms they are folded so that there are two protective metal layers on one side and four on the other, Fig. 8, or four on each side so that heat insulating layers of metal are provided on either side of the container to prevent burning of the container wall in case the heating tools become too hot and also to strengthen the joint. Specification 546,578 is referred to. Reference has been directed by the Comptroller to Specification 554,415.
Patent GB-1213426-A (GB)
Title: Apparatus for and method of preparing microspheres
Inventor: ASHBY GEORGE ELLIOTT
IPC: C01G43/025
Filed: 1969-03-10
Abstract: 1,213,426. Nuclear fuel. W. R. GRACE & CO. 10 March, 1969 [11 April, 1968], No. 12603/69. Heading G6C. [Also in Division C1] Microspheres of oxides of uranium, thorium, or plutonium are prepared using apparatus e.g. as shown in Fig. 1 wherein an aquasol of the metal oxide or an aqueous solution of a salt of the metal is subjected to the action of a vibrator 42, and the vibrated sol or solution is introduced into a quiescent zone 45 within a quantity of a water-extraction solvent by means of an injection tube 12. The droplets of the sol or solution are allowed to fall through the bulk of the extraction solvent and the microspherical particles produced thereby are recovered. Suitable specified means for creating the quiescent zone comprise either a casing tube positioned at the top of the column and surrounding the injection tube which extends coaxially through one end of the casing tube and terminates therein, or a chamber positioned at the top of said column and communicating therewith. If carbon is present in the aquasol or solution, the product may be reacted to form the corresponding metal carbide. Reference has been directed by the Comptroller to Specification 1,106,332.
Patent GB-1197181-A (GB)
Title: Improvements in or relating to Heating Installations
Inventor: SMITH CHARLES AQUILA VINCENT
IPC: F24B1/191
Filed: 1966-03-22
Abstract: 1,197,181. Electric fires. C. A. V. SMITH. 22 June, 1967 [22 March, 1966], No. 12636/66. Heading H3H. [Also in Division F4] An electric fire embodying bar heating elements and reflectors is adapted to be securely located within the front opening of a solid fuel fireplace by means of spring arms having at their outer ends resilient grips which are forced outwardly against the sides of the fireplace by eccentric cams carried on shafts. The inner ends of the spring arms are attached to the main body of the electric fire. A detachable reflector formed with a dimpled finish disposed beneath the main body of the electric fire together with a lamp provide a diffuse light source. A box-like apron may be fitted to the main body of the fire when it is desired to cover the grate as well as the front opening of the fireplace. The electric fire is provided with one or more legs so that it may alternatively be used as a free standing fire. In a modification the main body of the fire has an additional heating element concealed within it; apertures near the top and bottom of the body allow a connection flow of air to pass over the element.
Patent GB-256575-A (GB)
Title: Improvements in or relating to locomotives having combined internal combustion and electric propulsion systems
IPC: B61C9/24
Filed: 1926-05-17
Abstract: 256,575. Sulzer FrÞres Soc. Anon. Aug. 7, 1925, [Convention date]. Petrol-electric vehicles.-In locomotives having two or more engine-generator sets, the generator c of one set is placed opposite the engine b of another set so as to afford a wide passage between them. The fans f may be placed on the shafts as shown.